The ST Racing Arrma Aluminum Rear Threaded Shock Bodies are CNC Machined from thick high-quality aluminum and will provide improved damping performance and precision spring pre-load adjustment. Plus, the variety of anodized colors give you the custom options you have been looking for to make your Arrma rig truly one of a kind. Combine these shock bodies with ST Racing Aluminum Shock Caps for the ultimate in custom aesthetics! Package includes two red anodized rear shock bodies and two red anodized pre-load collars.